20705266 has 8 divisors (see below), whose sum is σ = 31359744. Its totient is φ = 10252020.

The previous prime is 20705261. The next prime is 20705273. The reversal of 20705266 is 66250702.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (20705261) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50050 + ... + 50461.

It is an arithmetic number, because the mean of its divisors is an integer number (3919968).

Almost surely, 2^20705266 is an apocalyptic number.

20705266 is a deficient number, since it is larger than the sum of its proper divisors (10654478).

20705266 is a wasteful number, since it uses less digits than its factorization.

20705266 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100616.

The product of its (nonzero) digits is 5040, while the sum is 28.

The square root of 20705266 is about 4550.3039458920. The cubic root of 20705266 is about 274.5956194341.

Adding to 20705266 its reverse (66250702), we get a palindrome (86955968).

The spelling of 20705266 in words is "twenty million, seven hundred five thousand, two hundred sixty-six".